Heating liquids by introduction into molten metal



Sept. 14 1926.

' D. RIDER ET AL HEATING LIQUIDs BY INTRODUGQ'ION INT0 MOLTEN METAL' Filed Feb, 28. 1.924

5. s, A Z/' Patented Sept. 14, .1926. l i i 'I UNITED STA'ri-ssfPAT'eNrforeros.

DOUGLAS RIDER AND JO'N sIMKINs WATTS, "or LONDON, ENGLAND, AssIGNons-To THERMAL INDUSTRIAL AND CHEMICAL (T: L. o.) nnsnAnorr oOMPANY LIMITED, or LONDON, ENGLAND, A BRr-TIsH ooisrieANY.v l a z.

f HEATING LroUrDs er INTRODUCTION I NTOMOLTEN METAL'.y

Appuqanm ined February 28,1924', serial No. 695.757, and ,nl Great Britain' Apru'z, ieee.

In U,"S.' .Patent No. 1,527.84?, "granted 'February 24, 1925 to A. MCD. Duckham `and J. S, Mor an, there Ais'described an apparatus for tie heat-treatment ofA liquids by introducing them as such beneath the surface of molten metal, comprising a hood or wide-mouthed pipe constructed in such a manner that while. thereis a minimum .of

liquid present in the hood at any time, the liquid is delivered beneaththe surface of the molten metal inthe formvof a thin stream or streams.

The present. invention relates to an improvement in that described in the' saidv specification. It has been found thatas the v `liquid emerges 'from the .hood and rises to the level of themolten metal tine globules of Vmetal are throym into the 'atmosphere' above the molten metal, cooled and tall back as solid metal pellets; Thesepellets'becomev coated lwith the liquid' andv thesurface ten, sion between the coated pellets 'and themolten metalis such that the elletsdo' not enter ther-molten metal again y'their own weight but float on the Surface of the molten 4metal.- Consequentl the liquidflowing from the hood over te surface of the metal.

carries these pellets alongwith it. It is' found, however, that if Vthese pelletsl build up upon each vother on the4 metal their weight eventually becomes such that the lower layer.

is vimmersed in the molten metal, the coating or viilm of liquid, which .may .be oil, is Adisparsed and the pellets melt again and enter themass of molten metal'. l n The invention consists in providing means wherebythe' building up ofthe pellets is ensured. Oneisuch means consistsinfittingparallel'toor around the hood at a short distance therefrom j. a guard plate, preferably` covered, the lower edge of which is immersed and the total height of which is suchv that when spurting occurs the fine pelletsv fall back in the space between the hood and the said guard plate. The liquid emerging from the .hood into the space betweenthe hood and guard plate builds up to the height of the guard plate or of a suitable slot cutin the upper part thereof andthen overflows on to the 'surface of the molten mei-,ai beyond the pla-te.4 Any pellets formed within the space cannot be lifted by the liquid to .the height ,of the gua-rd plats which is -sui'- Vieiei'it to ensure that the pellets accumulate a'vertieal transverse section through Apart' of an oil-still, provided with the improvement according to this invention. Figs. 2 and 3 are longitudinal sections on lines 2-.2 'and 3-3 respectively of Fig. l.

- a is a still'oontaining molten lead, the'su'rface of which is indicated by line", b; The

oil is pumped through pipe c, into along narrow, invertedxbox d the front wall e of which is shorter .in heightthan the 'rear wallY and has its lower edge's'errated, the serrations .being )ustusubmerged' in the lead,

(Jo-extensive With'this front wail', and lof' the saine height, is an inverted box considerably Wider than box d and having 'a slotv g in fthe upper part of its front wall. l

y The oil which issues through the lserrations in'th'e' wall e rises to the surface of the 'lead within the 'box f where the ire-melting of solidified pellets occurs'in the manner described above.; The Oil which coilects in thebox over-flows 'through the slot g onto the surface ot the' loadoutside the bony` Having thusv described. the nature of the' said'invention and the best Ameans we know of carrying the same 'into practical effect, we claim':-

l. Apparatus Afor the heattreatment of liquidsv by'mean-s of molten metal, 4comprising the receptacle to contain 'molten metal, .means for introducing the liquid beneath the surface of the'y molten'metalcontained in Ysaid receptacle, and means foi-preventing lmetal' globules formed from traversing' the generaly surface of the molten metal.

2. Apparatus for the heat treatment "of, liquids-by means of molten metal, comprising a receptacle to 'contain molten metal,

, means .for introducing the'liquidbeneath the surface of the molten metal contained in.

said receptacle, and a Weir over which liquid must pass after rising to the surface of the molten metal before it can flow over the general surface of the molten metal. l

3. Apparatus for the heat treatment of liquids by means of molten metal, compris# ing a receptacle to contain molten metal, means forintroducing theliquid. beneath the surface of the molten inetai contained in said receptacle and ya plate to project above the surface o the molten metal near the point at which liquid rises to the surface and situated' in the path of the liquid along the surface. 1* .z

4. Apparatus for theheat ltreatment of v* liquids by means of'molten metal', compristhe -general surface ofthe moltena metal thel portion of the suijfaceto which liquid rises vr:and adapted ,to cause liquid yto a'fccumulate mg a receptacle to contain molten. metal, means for introducing the liquid beneath the surface' of the molten'metal'contained in said receptacle, a plate for' isolating `from on? thel isolated portion ofthe surface 4to a depth which is not less than the height to which metal globules can build-up on the surface of the molten metal..v i

sol

In testimony whereof we have signed our y namesto this specification 'DOUGLAS RIDER. l

JOHN SIMKINS WATTS. 

